Bumps [wasm-instrument](https://github.com/paritytech/wasm-instrument)
from 0.3.0 to 0.4.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/paritytech/wasm-instrument/blob/master/CHANGELOG.md">wasm-instrument's
changelog</a>.</em></p>
<blockquote>
<h1>Changelog</h1>
<p>All notable changes to this project will be documented in this
file.</p>
<p>The format is based on <a
href="https://keepachangelog.com/en/1.0.0/">Keep a Changelog</a>,
and this project adheres to <a
href="https://semver.org/spec/v2.0.0.html">Semantic Versioning</a>.</p>
<p>The semantic versioning guarantees cover the interface to the
substrate runtime which
includes this pallet as a dependency. This module will also add storage
migrations whenever
changes require it. Stability with regard to offchain tooling is
explicitly excluded from
this guarantee: For example adding a new field to an in-storage data
structure will require
changes to frontends to properly display it. However, those changes will
still be regarded
as a minor version bump.</p>
<p>The interface provided to smart contracts will adhere to semver with
one exception: Even
major version bumps will be backwards compatible with regard to already
deployed contracts.
In other words: Upgrading this pallet will not break pre-existing
contracts.</p>
<h2>[Unreleased]</h2>
<h3>New</h3>
<ul>
<li>Add new gas metering method: mutable global + local gas function
<a
href="https://redirect.github.com/paritytech/wasm-instrument/pull/34">#34</a></li>
<li>Account for locals initialization costs
<a
href="https://redirect.github.com/paritytech/wasm-instrument/pull/38">#38</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/paritytech/wasm-instrument/commits/v0.4.0">compare
view</a></li>
</ul>
</details>
<br />


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Signed-off-by: dependabot[bot] <[email protected]>
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